Hi Jeff,
Yes I know about velomobiles, they are quite awesome and must be a lot more practical then 2 wheeled streamliners. Since I live in the Netherlands I see quite a lot of velomobiles.

Still, too expensive for me now since I'm only 17. But when I get a job I'm going to save up for an Alleweder (1000/1500 euro's 2nd hand here) or a Mango (2500/3000 euros 2nd hand) which I want to use as a car-alternative for as long as possible, which should be doable since the Netherlands is flat and small enough.

I do like the idea of homemade (coroplast) fairings and two wheeled streamlined shells since they are much cheaper and very adapt for homebuilding. If I had a trike or an OSS bent I'd definitely try and build a coroplast shell for it. On my two wheeled USS bent I'm not sure if it'd work well.